Contents 



Page 



Tlu> Pacific- saliiK.n 3 



Life hist ory 3 



("iiinook 8 



Rod 9 



Silver 10 



Pink 11 



Chum 11 



Steelhead trout 12 



The liomiug instinct 12 



Economic value 14 



Hatchery propagation of Pacific salmon 16 



Early history and objectives 16 



Circumstances reciuiring hatchery propagation 16 



Methods 22 



Spawn taking 25 



Incubation of eggs 28 



Rearing 30 



Diseases 32 



Foods for hatchery salmon 33 



The hatchery and fishery management 37 



The salmon hatchery 39 



Hatchery water supply 39 



The hatchery building 42 



Troughs 42 



Food preparation 44 



Food storage 45 



Rearing ponds 46 



Trapping adult salmon 48 



Adult holding ponds 51 



Personnel, equipment, and facilities 53 



Literature cited 54 



Photographs: Fig. 1 by Dick Black; fig.2by \V. F. Kuhichek (FWS); flg.Sby G. Kelez (FWS); 

 figs. 4, 9, 10, by H. F. Kelly (FWS); figs. 5, 13, 14, 20, 21, 22, 26, 27, by E. B. Horn (FWS); figs 6, 

 11, 23, 25, by Fish and Wildlife Service; figs. 7, 8, by Corps of Engineers; figs. 12, 15, 16, 17, by 

 Bureau of Reclamation; figs. 18, 19, by Z. Parkhurst (FWS); fig. 24 by W. Hagen, Jr. (FWS). 



